found: Das Privileg Papst Lucius' III. für das Stift Aschaffenburg von 1184, 1984:title page (Matthias Thiel)
found: LC data base, October 28, 1985(hdg.: Thiel, Matthias)
found: Thiel, Matthias. Studien zu den Urkunden Heinrichs V., 2017:title page (Matthias Thiel [deceased symbol]) page v (died January 30, 2015)
found: German Wikipedia, viewed January 2, 2018(Matthias Thiel; German historian and scholar of diplomatics; born April 21, 1929, in Trier-Ehrang; died January 30, 2015, in Göttingen; taught at the Universität Göttingen from 1977 to 1997)